$86.66In Stock — Usually Ships in 1–3 Business Days
About the CT318640
The Crucial CT318640 (CT318640 - Crucial 512MB DDR-400 MHz PC3200 non-ECC Unbuffered CL3 184-Pin DIMM Memory Module upgrade for Intel D865PERL) is a Desktop Memory component engineered for sustained enterprise-class workloads. This part addresses common procurement scenarios where exact-match replacement, capacity expansion, or new-build deployment is required. Technical specifications include capacity of 512 MB, number of sticks of 1, frequency of 400 MHz, connector of 184-pin, memory class of ECC, Unbuffered. Common deployment scenarios include database server upgrades (in-memory caches, SQL buffer pools), VMware ESXi / Hyper-V virtualization host memory expansion, GPU compute scratch pools, and HPC node provisioning. Pro Disk Network sources the CT318640 through reputable distribution channels and applies a verification check against the OEM compatibility matrix before each unit is added to active inventory. Each unit ships from the US with dispatch in 1–3 business days. 90-day Pro Disk Network functional warranty included; free US ground shipping on orders over $150.
The CT318640 is a Crucial desktop memory component with capacity 512 MB, number of sticks 1, frequency 400 MHz. Pro Disk Network sells the CT318640 for $86.66 with US shipping in 1–3 business days and a 30-day return guarantee.
Reviewed By
Reviewed by:Pro Disk Network Engineering Team — . Specifications, compatibility, and pricing for the CT318640 are shown on this page.
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US Shipping in 1–3 Business Days — in-stock orders ship via UPS
30-Day Returns — pre-paid label on DOA and defective items
Quick Answer: What servers is the CT318640 compatible with?
The CT318640 is a Crucial desktop memory module. Confirm DIMM rank, voltage, and speed against the target server's supported memory list before deployment - mixed configurations may downclock to the slowest installed module. For server-specific population diagrams, email sales@prodisknetwork.com with your server serial number.
How fast does the CT318640 ship?
CT318640 orders ship in 1–3 business days from US warehouses. Delivery is next business day to most metro ZIPs via FedEx/UPS overnight; ground delivery covers remaining US in 1-4 business days.
The CT318640 is deployed by US enterprises, MSPs, government, and education customers across multiple infrastructure scenarios. Below are the most common deployment patterns Pro Disk Network sees in real-world orders.
In-Memory Database — SAP HANA, Redis Enterprise, Apache Ignite, Aerospike — workloads that scale linearly with DRAM capacity.
Hyper-V Cluster Node — Windows Server 2019/2022 Hyper-V hosts with Storage Spaces Direct. Dynamic memory allocation makes higher-density DIMMs cost-effective.
AI / ML Training — PyTorch and TensorFlow workloads benefit from large host memory pools for dataset preprocessing and CPU-side feature engineering.
Tanzu / Kubernetes Workers — Worker node memory expansion for high-density container deployments. Plan for 8–16 GB per moderate Pod baseline.
What is the CT318640?
The CT318640 is a Crucial server memory module with capacity 512 MB and number of sticks 1, manufactured by Crucial. Pro Disk Network ships this part new and certified-refurbished from our US warehouse with dispatch in 1–3 business days, backed by a 30-day return guarantee.
Pros & Cons of CT318640
Pros
RDIMM / LRDIMM clearly labelled for population-rule clarity
Cons
Memory must match existing DIMM rank/density for channel balance
Higher density modules can drop overall channel speed
BIOS update may be required on older revisions
Frequently Asked Questions about CT318640
Is the CT318640 a genuine Crucial part?
Yes. Pro Disk Network sources every CT318640 as factory-original Crucial inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned Crucial servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
What servers is the CT318640 compatible with?
The CT318640 is a Crucial desktop memory module. Confirm DIMM rank, voltage, and speed against the target server's supported memory list before deployment - mixed configurations may downclock to the slowest installed module. For server-specific population diagrams, email sales@prodisknetwork.com with your server serial number.
How fast does the CT318640 ship?
CT318640 orders ship in 1–3 business days from US warehouses. Delivery is next business day to most metro ZIPs via FedEx/UPS overnight; ground delivery covers remaining US in 1-4 business days.
What is the warranty on the CT318640?
New CT318640 units carry the full Crucial manufacturer warranty (typically 1 to 5 years depending on product line). Refurbished and bulk-OEM units include a Pro Disk Network advance-replacement warranty (90 days refurbished). DOA replacement is free within 30 days of receipt.
Do you offer bulk pricing for the CT318640?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
Compatibility: Rank, Density, and Channel Population Rules
Quad-rank modules behave differently from dual-rank: most modern Xeon platforms support 1-2 DPC (DIMMs per channel) at full speed with single- and dual-rank modules but downclock with quad-rank above 1 DPC. RDIMM and LRDIMM are not interchangeable in the same channel. ECC and non-ECC cannot be mixed. Server motherboards expect server DIMMs — the CT318640 is a server module and will not work in consumer desktop boards.
Pricing Strategy: New, Bulk, or Refurbished
If you are buying 16 or more modules at once, request a matched-lot quote: sequential manufacturing dates and serial numbers, which reduces variance in observed memory speeds across the channel. Pro Disk Network ships matched-lot orders for free on volumes of 16+.